Bicycle handlebar stem



FIG. 1 is a perspective view of my new design for a bicycle handlebar stem;

FIG. 2 is a side elevational view of one side thereof, the opposite side being a mirror image thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a bicycle handlebar stem, as shown and described. 